CN104349263B - The test device and its test method of a kind of sound proof box and the application sound proof box - Google Patents
The test device and its test method of a kind of sound proof box and the application sound proof box Download PDFInfo
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- CN104349263B CN104349263B CN201410453578.2A CN201410453578A CN104349263B CN 104349263 B CN104349263 B CN 104349263B CN 201410453578 A CN201410453578 A CN 201410453578A CN 104349263 B CN104349263 B CN 104349263B
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Abstract
The present invention provides the test device and its test method of a kind of sound proof box and the application sound proof box, wherein sound proof box is using the outer case structure nested with internal box, supported between two babinets using isolation cushion, isolation cushion can effectively eliminate influence of the outer case physical shock to internal box.Cavity during use between inside and outside babinet is in vacuum state, and sound cannot be propagated in a vacuum, and institute is so as to effectively completely cut off external voice；The damping chain of test device and beam also effectively reduce influence of the vibrations to sound proof box at the same time, so as to realize the purpose to microphone SNR tests well.In addition, being to be evacuated the cavity between babinet inside and outside sound attenuator during test, rather than product is placed directly within vacuum environment and is tested, can effectively prevent from vacuumizing the damage to microphone products vibrating diaphragm；The test device of the present invention can be also used for laboratory and producing line realizes the test of the performance parameters such as sensitivity of microphone, background noise, THD.
Description
Technical field
The present invention relates to electronic product technical field of measurement and test, the test of more particularly to a kind of sound-proofing and the application sound proof box
Device and test method.
Background technology
Higher and higher to the performance requirement of microphone monomer with increasing for consumer electronics function, the SNR of microphone will
Ask and have reached 70dB, each electroacoustic laboratory and producing line are difficult to realize the microphone products of SNR signal-to-noise ratio >=70 in industry at present
SNR is tested.
The content of the invention
The present invention provides the test device and test method of a kind of sound proof box and the application sound proof box, to solve reality
Test room and the problem of producing line is difficult to realize the microphone products SNR tests of SNR signal-to-noise ratio >=70.
To reach above-mentioned purpose, the embodiment of the present invention employs following technical solution:
The present invention provides a kind of sound proof box, including outer case, internal box and isolation cushion, described in the isolation cushion support
Internal box is nested in the outer case, forms cavity between the internal box and the outer case, the sky in the internal box
Chamber is test inner cavity, and the outer case includes an outer case door, and the internal box includes an internal box door, the outer case
Door and internal box door setting in T shape.
Preferably, the sound proof box further includes venthole and air admission hole, and the venthole is used to make the interior case when testing
The cavity formed before body and the outer case becomes vacuum chamber, and the air admission hole is used at the end of testing, and makes the sky
Chamber is consistent with ambient pressure.
Preferably, the internal box and the outer case are metal material.
On the one hand, present invention also offers a kind of test device using above-mentioned sound proof box, the test device to further include
Stent, damping chain and beam, the stent are used to hang the sound proof box, the damping chain, for by the sound insulation
Case is hung on the bracket, and the damping chain is can to eliminate the bullet that the stent vibrations have an impact the sound proof box
Property structure, the beam is used to support the stent, weakens influence of the earth shock to the stent.
Preferably, the test device can meet the microphone products SNR tests of SNR >=70.
Preferably, the test device can be also used for the test of sensitivity of microphone, background noise, total harmonic distortion.
Another further aspect, invention also provides it is a kind of using above-mentioned test device carry out microphone SNR tests method,
Comprise the following steps：
The outer case door and internal box door of sound proof box are opened according to this, and microphone to be measured is put into the test cavity of internal box
It is interior, then the internal box door and outer case door of sound proof box are shut according to this；
Gas is evacuated to the cavity between outer case and internal box by venthole, the cavity is reached vacuum state,
Simultaneously as outer case door and the setting in T shape of internal box door, pressure can effectively closed outer case and internal box；
SNR tests are carried out to microphone, obtain test result；
After test, air admission hole is opened, makes the cavity pressure between outer case and internal box consistent with the external world.
The beneficial effect of the embodiment of the present invention is：Sound proof box is using the outer case structure nested with internal box, two babinets
Between supported using isolation cushion, isolation cushion can effectively eliminate influence of the outer case physical shock to internal box.It is interior during use
Cavity between outer case is in vacuum state, and the T-shaped design of outer case door and internal box door can effective closed outer container
Body and internal box, sound cannot be propagated in a vacuum, and institute is so as to effectively completely cut off external voice；The damping of test device at the same time
Chain and beam also effectively reduce influence of the vibrations to sound proof box, and microphone SNR is tested so as to realize well
Purpose.In addition, being to be evacuated the cavity between babinet inside and outside sound attenuator during test, rather than product is placed directly within very
Tested in Altitude, can effectively prevent from vacuumizing the damage to microphone products vibrating diaphragm.
The test device of sound proof box provided by the invention and the application sound proof box can effectively eliminate external environment to wheat
The interference of gram wind test, in addition to the test that can realize microphone SNR >=70dB, can also realize Mike in laboratory and producing line
The test of the performance parameters such as wind sensitivity, background noise, THD.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of sound proof box provided by the invention；
Fig. 2 is a kind of sectional view of sound proof box A lines along Fig. 1 provided by the invention；
Fig. 3 is a kind of structure diagram of test device using sound proof box provided by the invention；
Fig. 4 is the method flow diagram provided by the invention for carrying out SNR tests to microphone using sound proof box test device.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 and Fig. 2 gives the structure diagram of sound proof box provided by the present invention, and the sound proof box includes outer case
41st, internal box 42 and isolation cushion 43, the isolation cushion 43 supports the internal box 42 to be nested in the outer case 41, described
Cavity 411 is formed between internal box 42 and the outer case 41, the cavity in the internal box 42 is test inner cavity 421, described
Outer case 41 includes an outer case door 412, and the internal box 42 includes an internal box door 422,412 He of outer case door
The setting in T shape of internal box door 422.In addition, the sound proof box further includes venthole 44 and air admission hole 45, the outlet
Hole 44 is used to make the cavity 411 formed before the internal box 42 and the outer case 41 become vacuum chamber, institute when testing
State air admission hole 45 be used for test at the end of, make the cavity 411 consistent with ambient pressure.
When using the sound proof box, outer case door 412 and internal box door 422 are opened successively, trial product to be measured is put into
Test in inner cavity 421, internal box door 422 and outer case door 412 are then closed successively, then by venthole 44 to cavity 411
Vacuumized, as shown in Fig. 2, because outer case door 412 and internal box door 422 use T-shaped setting, gas in cavity 411
In body evacuation process, the air pressure in cavity 411 tapers into so that outer case door 412 and internal box door 422 more closely close
Close, because sound cannot be propagated in vacuum environment, institute realizes sound insulation test so as to thoroughly completely cut off external voice
Purpose.
Sound proof box provided by the present invention is because be by the cavity 411 between outer case 41 and internal box 42 take out very
Sky, rather than product is placed directly within vacuum environment and is tested, it can effectively prevent from vacuumizing the damage to product vibrating diaphragm.
Further, in practical application, the internal box 42 and the outer case 41 are metal material, can so rise
To electromagnetic shielding action, and reach above-mentioned technique effect.
Fig. 3 gives the structure diagram of the test device provided by the present invention using above-mentioned sound proof box, the test
Device includes stent 1, damping chain 2, beam 3 and above-mentioned sound proof box 4, and the stent 1 is used to hang the sound proof box 4,
The damping chain 2, for the sound proof box 4 to be suspended on the stent 1, the damping chain 2 has elasticity, Neng Gouyou
Effect is eliminated because the stent 1 shakes the influence to the sound proof box 4, and the beam 3, is used to support the stent 1, weakens ground
Shake the influence to the stent 1 in face.
Sound proof box 4 is suspended on stent 1 by test device provided by the present invention by elastic shock attenuation chain 2 can be effective
Influence of the vibrations for eliminating ground or supporter to sound proof box 4, while beam 3 also weakens earth shock to the stent
1 influence, so as to more effectively be supplied to the test stable test environment in inner cavity 421 1.
It should be noted that test device provided by the invention can meet the microphone products SNR tests of SNR >=70,
It may be simultaneously used for the test of sensitivity of microphone, background noise, total harmonic distortion.
Fig. 4 gives the side provided by the present invention for carrying out SNR tests to microphone using above-mentioned sound proof box test device
Method flow chart, when needing to carry out SNR tests to microphone, opens the outer case door 412 and internal box door of sound proof box 4 according to this
422, microphone to be measured is put into the test cavity 421 of internal box 42, then shut the internal box door 422 of sound proof box and outer according to this
Cabinet door 411；Gas is evacuated to the cavity 411 between outer case 41 and internal box 42 by venthole 44, makes the cavity 411
Reach vacuum state, simultaneously as 422 setting in T shape of outer case door 412 and internal box door, pressure can effectively closed outer cases
41 and internal box 42；SNR tests are carried out to microphone, obtain test result；After test, air admission hole 45 is opened, makes outer container
411 pressure of cavity between body 41 and internal box 42 is consistent with the external world.
In conclusion test device and its test method the present invention provides a kind of sound proof box and using the sound proof box,
Wherein sound proof box uses the outer case structure nested with internal box, is supported between two babinets using isolation cushion, isolation cushion can
Effectively eliminate influence of the outer case physical shock to internal box.Cavity during use between inside and outside babinet is in vacuum state, and
The T-shaped design of outer case door and internal box door closed outer case and internal box, sound cannot effectively can pass in a vacuum
Broadcast, institute is so as to effectively completely cut off external voice；The damping chain of test device and beam also effectively reduce shake at the same time
The dynamic influence to sound proof box, so as to realize the purpose to microphone SNR tests well.In addition, it is by sound attenuator during test
Cavity between inside and outside babinet is evacuated, rather than product is placed directly within vacuum environment and is tested, and can effectively be prevented
Vacuumize the damage to microphone products vibrating diaphragm；The test device of the present invention can be also used for laboratory and producing line realizes microphone
The test of the performance parameters such as sensitivity, background noise, THD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (6)
1. a kind of sound proof box, it is characterised in that including outer case, internal box and isolation cushion, the isolation cushion support is described interior
Babinet is nested in the outer case, forms cavity between the internal box and the outer case, the cavity in the internal box
To test inner cavity, the outer case includes an outer case door, and the internal box includes an internal box door, the outer case door
With internal box door setting in T shape, and the big end of the T-shaped structure of internal box door with test inner cavity connect, small end and
Cavity connects, and the big end of T-shaped structure of outer case door is connected with the external environment condition of outer case, and small end is connected with cavity；
The sound proof box further includes venthole and air admission hole, and the venthole is used to make the internal box and the outer container when testing
The cavity formed before body becomes vacuum chamber, and the air admission hole is used at the end of testing, and makes the cavity and ambient pressure
Unanimously.
2. sound proof box according to claim 1, it is characterised in that the internal box and the outer case are metal material.
3. a kind of test device for applying the sound proof box as described in claim 1 to 2 any claim, it is characterised in that described
Test device further includes stent, damping chain and beam, and the stent is used to hanging the sound proof box, the damping chain,
For by sound proof box suspension, on the bracket, the damping chain to be can to eliminate the stent vibrations to the sound insulation
The elastic construction that case has an impact, the beam, is used to support the stent, weakens shadow of the earth shock to the stent
Ring.
4. test device according to claim 3, it is characterised in that the test device can meet the wheat of SNR >=70
Gram wind product SNR test.
5. test device according to claim 3, it is characterised in that it is sensitive that the test device can be also used for microphone
The test of degree, background noise, total harmonic distortion.
6. a kind of method for applying test device as claimed in claim 3 to carry out microphone SNR tests, includes the following steps：
The outer case door and internal box door of sound proof box are opened according to this, and microphone to be measured is put into the test cavity of internal box, then
The internal box door and outer case door of sound proof box are shut according to this；
Gas is evacuated to the cavity between outer case and internal box by venthole, the cavity is reached vacuum state, at the same time
Because outer case door and the setting in T shape of internal box door, pressure can effectively closed outer case and internal box；
SNR tests are carried out to microphone, obtain test result；
After test, air admission hole is opened, makes the cavity pressure between outer case and internal box consistent with the external world.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453578.2A CN104349263B (en) | 2014-09-07 | 2014-09-07 | The test device and its test method of a kind of sound proof box and the application sound proof box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410453578.2A CN104349263B (en) | 2014-09-07 | 2014-09-07 | The test device and its test method of a kind of sound proof box and the application sound proof box |
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| CN104349263A CN104349263A (en) | 2015-02-11 |
| CN104349263B true CN104349263B (en) | 2018-04-17 |
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| CN201410453578.2A Active CN104349263B (en) | 2014-09-07 | 2014-09-07 | The test device and its test method of a kind of sound proof box and the application sound proof box |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106303885B (en) * | 2016-09-29 | 2020-02-28 | 歌尔股份有限公司 | Noise control method and system and sound insulation box |
| CN107566932A (en) * | 2017-09-26 | 2018-01-09 | 卢毅祥 | A kind of microphone vacuum sound insulation cup |
| CN110636432A (en) * | 2019-09-29 | 2019-12-31 | 深圳市火乐科技发展有限公司 | Microphone testing method and related equipment |
| CN111405392A (en) * | 2019-10-30 | 2020-07-10 | 徐州积木电子科技有限公司 | Sound insulation box for electric window opener |
| CN115604613B (en) * | 2022-12-01 | 2023-03-17 | 杭州兆华电子股份有限公司 | Sound interference elimination method based on sound insulation box |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497248Y (en) * | 2001-09-10 | 2002-06-26 | 广东科龙电器股份有限公司 | Multi-layer door-sealing refrigerator |
| EP1630788B1 (en) * | 2004-08-26 | 2012-04-18 | Airbus Operations GmbH | Device and method for reducing sound of a noise source in narrow frequency ranges |
| CN200997684Y (en) * | 2006-12-30 | 2007-12-26 | 比亚迪股份有限公司 | Sound-isolating box for inspecting audio frequency |
| CN201438762U (en) * | 2009-04-15 | 2010-04-14 | 天津科技大学 | Sound attenuating chamber for loudspeaker pure tone online detection |
| CN202496065U (en) * | 2012-02-22 | 2012-10-17 | 比亚迪股份有限公司 | Sound-proofing device |
| CN102750945A (en) * | 2012-07-12 | 2012-10-24 | 苏州岸肯电子科技有限公司 | Silence chamber |
| CN203798130U (en) * | 2014-04-24 | 2014-08-27 | 成都樵枫科技发展有限公司 | Reinforced sealing square drying box |
| CN204119468U (en) * | 2014-09-07 | 2015-01-21 | 歌尔声学股份有限公司 | The testing apparatus of a kind of sound proof box and this sound proof box of application |
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Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Applicant before: Goertek Inc. |
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